1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * drivers/net/phy/ste10Xp.c
4 *
5 * Driver for STMicroelectronics STe10Xp PHYs
6 *
7 * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
8 *
9 * Copyright (c) 2008 STMicroelectronics Limited
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/sched.h>
15#include <linux/kernel.h>
16#include <linux/moduleparam.h>
17#include <linux/interrupt.h>
18#include <linux/netdevice.h>
19#include <linux/ethtool.h>
20#include <linux/mii.h>
21#include <linux/phy.h>
22
23#define MII_XCIIS   	0x11	/* Configuration Info IRQ & Status Reg */
24#define MII_XIE     	0x12	/* Interrupt Enable Register */
25#define MII_XIE_DEFAULT_MASK 0x0070 /* ANE complete, Remote Fault, Link Down */
26
27#define STE101P_PHY_ID		0x00061c50
28#define STE100P_PHY_ID       	0x1c040011
29
30static int ste10Xp_config_init(struct phy_device *phydev)
31{
32	int value, err;
33
34	/* Software Reset PHY */
35	value = phy_read(phydev, MII_BMCR);
36	if (value < 0)
37		return value;
38
39	value |= BMCR_RESET;
40	err = phy_write(phydev, MII_BMCR, value);
41	if (err < 0)
42		return err;
43
44	do {
45		value = phy_read(phydev, MII_BMCR);
46	} while (value & BMCR_RESET);
47
48	return 0;
49}
50
51static int ste10Xp_config_intr(struct phy_device *phydev)
52{
53	int err, value;
54
55	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
56		/* Enable all STe101P interrupts (PR12) */
57		err = phy_write(phydev, MII_XIE, MII_XIE_DEFAULT_MASK);
58		/* clear any pending interrupts */
59		if (err == 0) {
60			value = phy_read(phydev, MII_XCIIS);
61			if (value < 0)
62				err = value;
63		}
64	} else
65		err = phy_write(phydev, MII_XIE, 0);
66
67	return err;
68}
69
70static int ste10Xp_ack_interrupt(struct phy_device *phydev)
71{
72	int err = phy_read(phydev, MII_XCIIS);
73	if (err < 0)
74		return err;
75
76	return 0;
77}
78
79static struct phy_driver ste10xp_pdriver[] = {
80{
81	.phy_id = STE101P_PHY_ID,
82	.phy_id_mask = 0xfffffff0,
83	.name = "STe101p",
84	/* PHY_BASIC_FEATURES */
85	.config_init = ste10Xp_config_init,
86	.ack_interrupt = ste10Xp_ack_interrupt,
87	.config_intr = ste10Xp_config_intr,
88	.suspend = genphy_suspend,
89	.resume = genphy_resume,
90}, {
91	.phy_id = STE100P_PHY_ID,
92	.phy_id_mask = 0xffffffff,
93	.name = "STe100p",
94	/* PHY_BASIC_FEATURES */
95	.config_init = ste10Xp_config_init,
96	.ack_interrupt = ste10Xp_ack_interrupt,
97	.config_intr = ste10Xp_config_intr,
98	.suspend = genphy_suspend,
99	.resume = genphy_resume,
100} };
101
102module_phy_driver(ste10xp_pdriver);
103
104static struct mdio_device_id __maybe_unused ste10Xp_tbl[] = {
105	{ STE101P_PHY_ID, 0xfffffff0 },
106	{ STE100P_PHY_ID, 0xffffffff },
107	{ }
108};
109
110MODULE_DEVICE_TABLE(mdio, ste10Xp_tbl);
111
112MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver");
113MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
114MODULE_LICENSE("GPL");
115